The "open letter" from Senator Tom Cotton and 46 other Republican Senators to the leadership of Iran, which even Republicans themselves admit was aimed at encouraging Iranian opponents of the nuclear negotiations to argue that the United States cannot be counted on to keep the bargain, has created a new political firestorm. It has been harshly denounced by Democratic loyalists as "stunning" and "appalling", and critics have accused the signers of the letter of being "treasonous" for allegedly violating a law forbidding citizens from negotiating with a foreign power.

But the response to the letter has primarily distracted public attention from the real issue it raises: how the big funders of the Likud Party in Israel control Congressional actions on Iran.

The infamous letter is a ham-handed effort by Republican supporters of the Netanyahu government to blow up the nuclear negotiations between the United States and Iran.